Water saturation models greatly affect reserves calculations

Among the challenges in water saturation and hence oil saturation calculations are the accuracy of the applied model and the accuracy of its input parameters. Even in the most simplistic reservoirs where the Archie model is applicable, these parameters affect the accuracy of the calculated saturation.Many in the petroleum industry focus on one parameter, namely Rt or true formation resistivity, thinking that it is the most important factor in all applications.Sometimes companies spend thousands of dollars trying to perfect this parameter, although an erroneous Rt might not generate the largest errors.This article discusses all the saturation input parameters, namely: formation water resis...

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